N-methacroyl n&#39;-(methyl-alanyl) methylene diamides



Patented Nov. 27, 1951 UNITED STATES PATENT OF F I CE N-METHACR OYL N'- (METHYL-ALANYL) METHYLENE DIAMIDES corporation of Delaware No Drawing. Application April 1, 1949, Serial No. 85,039

2 Claims. 1 This invention relates to new organic materials.

In my patent application Serial No.=285,-038,, filed on even date herewith and'now'abandoned, there are described and claimed, as new 'polymerizable monomers, the methylene-bis-amides of unsaturated polymerizable acids, the said'products corresponding to the general formula I have found according to the present invention that certain newand'useful products may be obtained by proper further reactions with these materials.

The above compounds contain in their molecular structure at least two reactive double bonds, such -double bonds being present in each of the terminal CnH2nl groups, and can,-ther'efore, be

subjected to certain specific reactions, in accordance with the present invention, which lead by the formation of addition compounds tosaturationof only one of the available'unsaturated'reactive groups. Such products may be represented by the formula II I I 'C,;Hzn-r-C-NCHzN -X where X is an addition product of CfiH2n1, and where n is an integer of from 2 to 4. e

The addition productsthus obtained, namely those in'which only one of the terminal CnH'2n1 groups has been saturated by the formation of an addition compound, may be further treated to 2 claimed'in my copending patent application Serial No; 85,040 filed on even date herewith may Joe-described as polymerization products of compounds of the general formula whereY-is a'radicals'elected from the group consisting of CnHZn-l and addition products of CnH2w-1; and wheren is'an integer of from 2 to 4.

As described in my above identifiedapplication Serial No. 185,038, -methylene-bis-methacrylamide may be prepared as follows: 10 parts of methacrylamideare dissolved in 35 parts of water at a temperature of approximately 40 C.,-and'0;01 part of copper sulfate is added thereto as a polymerization inhibitor. To this solution there are-addedl5 parts of concentrated sulfuric acid and 4.8 parts of 37% formalin. The reaction mixture is thereupon heated in-a suitable reactionwessel toa temperature of C. and is refluxed foraperiod :of time-sufiicient to effect substantially complete reaction of the reacting constituents, 1a reflux period of approximately 15 minutes usually being sufiicient to effect substantially complete reaction. The reaction mixture is then: permitted; to cool to a temperature of'approximately "60 C. whereupon a white-crystalline precipitate' fo-rms, which satisfactorily may be separated by filtration'and further purified by recrystallization from hot water. The material thus obtained corresponds to the formula or in the form of their derivatives such as their esters, amides, nitriles, etc.

The "materials obtained :in accordance with the above :outlined PTOCBdlil may be subjected to polymerization reactions to form valuable resinous reaction products.

Illustrative of the preparation of such polymer materials is the following example.

Example 1 An aqueous solution of methylene-bis-methacrylamide is treated with a 30% aqueous solution of hydrogen peroxide in an amount containing approximately 0.3% hydrogen peroxide based on the Weight of the methylene-bis-methacrylamide, and the solution is heated to boiling. Upon such treatment a white polymer material is formed which precipitates from solution.

Another aspect of the present invention is the preparation of addition products of the polymerizable unsaturated monomers described and claimed in my application, Serial No. 85,038, filed on even date herewith, in which only one of the terminal unsaturated reactive groups is converted into a saturated grouping by suitable reaction. A variety of difierent materials can be employed to effect such reaction with the terminal unsaturated groups of the methylene-bis-amides of the said patent application, Serial No. 85,038. Illustrative of some of the materials which will react are compounds such as sodium bisulfite, alcohols, halogens, conjugated diolefins, amines, compounds having an active hydrogen, hydrogen sulfide and mercaptans.

By selectively effecting the reaction between the materials above set forth and the methylenebis-amides of my application, Serial No. 85,038, such that saturation of only one of the terminal unsaturated groups of the said methylene-bisamides becomes saturated, the resulting addition products are capable of undergoing further reaction involving polymerization of the addition product by cross linkage between the available unreacted unsaturated groups to form valuable resinous products. The properties and characteristics of such polymers will vary with, and depend upon in part, upon the particular modifying reacting material employed to effect saturation of one of the unsaturated groups of the monomers prior to polymerization. The polymeric materials obtained by effecting polymerization of the addition compounds herein described, are further described and claimed in my copending application, Serial No. 85,040, filed on even date herewith.

The addition products above set forth may be obtained by reacting equimolecular amounts of a methylene-bis-amide of a polymerizable unsaturated acid, said acid belonging to the group having the general formula CHHZn-ZOZ, where n is an integer of from 3 to 5 and a modifying reacting material of the group above set forth under reaction conditions described hereinafter in several illustrative examples. The reactions are carried out in the presence of a small amount of a polymerization inhibitor, an amount of such polymerization inhibitor corresponding to approximately 0.2 part by weight of the reacting ingredients being adequate for such purpose. As polymerization inhibitors, there may be employed copper sulfate, copper wire, freshly precipitated metallic copper, or an organic compound such as hydroquinone.

Illustrative of examples setting forth this aspect are the following.

Example 2 To 2 parts of methylene-bis-methacrylamide dispersed in 50 parts of water and in the presence 4 of 0.2 part of copper sulfate, there is added, with stirring and at normal room temperatures a solution of 1.2 parts of sodium bisulfite in 24 parts of water. Agitation of the reaction mixture is continued for a period of approximately 5 hours and the mixture is thereafter allowed to stand for approximately 12 hours. After settling, the reaction mixture is filtered to remove impurities and the filtrate is distilled to dryness at a temperature of approximately 40 C. and under vacuum conditions. The residue from such distillation is then purified by recrystallization from a water-alcohol mixture, being obtained in the form of white "powdery crystals. The material so obtained is the sodium bisulfite addition product of methylenebis-methacrylamide and corresponds to the formula CH3 0 H H 0 CH3 This product melts with decomposition at 315 C. Calculated nitrogen in the sodium bisulfite addition product is 9.79%; actual nitrogen found was 9.67%.

The above reaction may be carried out at elevated temperatures with a consequent reduction in the length of time necessary for completion of the reaction. However, polymer formation is increased at the higher temperatures with a consequent reduction in the amount of addition product obtainable for anequivalent amount of reacting materials. Y Y

Example 3 The sodium bisulfite addition product of methylene-bis-methacrylamide may be treated in solution with a 30% aqueous hydrogen peroxide solution, and the resulting solution heated to boil- -ing to effect polymerization thereof. An amount of hydrogen peroxide equivalent to approximately 0.3% by weight of the dissolved addition product is satisfactorily employed for such purpose. The polymerization product thus formed is an insoluble' resinous material.

Example 4 Three parts of methylene-bis-methacrylamide dispersed in 60 parts of water, together with 0.2 part copper sulfate are charged to a suitable reaction vessel, and 1.2 parts of diethylamine are added thereto. The reaction mixture is then heated to C. over a period of time sufficient to effect substantially complete reaction of the reacting components, a period of approximately 10 to 20 minutes usually being adequate, and thereafter allowed to cool. After cooling, the reaction mixture is filtered to remove impurities and is then allowed to stand for two days, during which time a white crystalline material settles out. The material thus obtained is the diethylamine addition product of methylene-bis-methacrylamide corresponding to the formula This material does not have a clear melting point as does methylene-bis-methacrylamide but polymerizes instead on heating.

The reaction outlined in Example 4 may also be carried out at lower temperatures than the temperature specifically set forth therein. The length of time required to effect such reaction, however, will be considerably increased.

Example 5 Aqueous solutions of the addition product oi Example 4 may be polymerized to an insoluble resinous material upon treatment with a 30% aqueous hydrogen peroxide solution. The conditions of reaction for such polymer formation may be similar to the conditions set forth in Example 3.

Other amine addition products may also be prepared in accordance with the present invention by substituting, in equivalent molecular proportions, other primary and secondary aliphatic amines for the diethylamine in the reaction outlined in Example 4. Such other amines which may be employed to prepare the addition products of the present invention include, for example, methylamine, ethylamine, dimethylamine and the higher primary and secondary amines such as decylamine, octadecyl methylamine, etc.

Similarly, other bisulfite products may also be prepared by substituting, for example, potassium bisulfite in equivalent molecular proportions for the sodium bisulfite in the reaction outlined in Example 2.

While the above products and the processes of making the same constitute preferred embodiments of the present invention, changes may be made therein without departing from the scope of the present invention, as defined in the appended claims.

What is claimed is:

1. As a new product, a compound of the formula REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Number Lundberg July 12, 1949 

2. AS A NEW PRODUCT, A COMPOUND OF THE FORMULA 